双向变换器的两段式软起动方法

双向变换器在两端"源"的运用场合下,采用传统的软起动方法,由于开关管互补导通,会从输出端"源"引入反向电感电流,导致损坏变换器。提出一种新颖的双向变换器两段式软起动方法,通过对主控管和被控管均实施软起动,可实现双向变换器在两端"源"下的开机软起动,避免产生反向电感电流。两段式软起动方法适用于一族的双向变换器,并可推广到多电平双向变换器中。该文最后给出了双向变换器两段式软起动及在燃料电池供电系统中开机的实验结果,验证了双向变换器两段式软起动方法的有效性。

Two-phase Soft Start Method for Bi-directional DC-DC Converter

Due to complemented operation of switches in bi-directional converter, traditional soft start method will give rise to large inverse inductor current from the output source at double sources application, and result in damage of converter. This paper proposes a novel soft start method-two-phase soft start method. By implementing soft start of both active switch and passive switch, two-phase soft start method can realize bi-directional converter soft start at double sources application, avoiding inverse inductor current. Two-phase soft start method applies to a series of bi-directional converter and can be extended to multi-level bi-directional converter. Experimental results of two-phase soft start and startup in fuel cell power system are finally given to verify the effectiveness of two-phase soft start method.